[3] | 1 | """ |
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| 2 | This plugin provides assert introspection. When the plugin is enabled |
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| 3 | and a test failure occurs, the traceback is displayed with extra context |
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| 4 | around the line in which the exception was raised. Simple variable |
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| 5 | substitution is also performed in the context output to provide more |
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| 6 | debugging information. |
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| 7 | """ |
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| 8 | |
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| 9 | from nose.plugins import Plugin |
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| 10 | from nose.inspector import inspect_traceback |
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| 11 | |
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| 12 | class FailureDetail(Plugin): |
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| 13 | """ |
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| 14 | Plugin that provides extra information in tracebacks of test failures. |
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| 15 | """ |
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| 16 | score = 600 # before capture |
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| 17 | |
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| 18 | def options(self, parser, env): |
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| 19 | """Register commmandline options. |
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| 20 | """ |
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| 21 | parser.add_option( |
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| 22 | "-d", "--detailed-errors", "--failure-detail", |
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| 23 | action="store_true", |
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| 24 | default=env.get('NOSE_DETAILED_ERRORS'), |
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| 25 | dest="detailedErrors", help="Add detail to error" |
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| 26 | " output by attempting to evaluate failed" |
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| 27 | " asserts [NOSE_DETAILED_ERRORS]") |
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| 28 | |
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| 29 | def configure(self, options, conf): |
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| 30 | """Configure plugin. |
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| 31 | """ |
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| 32 | if not self.can_configure: |
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| 33 | return |
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| 34 | self.enabled = options.detailedErrors |
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| 35 | self.conf = conf |
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| 36 | |
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| 37 | def formatFailure(self, test, err): |
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| 38 | """Add detail from traceback inspection to error message of a failure. |
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| 39 | """ |
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| 40 | ec, ev, tb = err |
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| 41 | tbinfo = inspect_traceback(tb) |
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| 42 | test.tbinfo = tbinfo |
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| 43 | return (ec, '\n'.join([str(ev), tbinfo]), tb) |
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